Evaluation of staged air and overfire air in regulating air-staging conditions within a large-scale down-fired furnace

Kuang, Min; Li, Zhengqi; Ling, Zhongqian; Zeng, Xianyang

doi:10.1016/j.applthermaleng.2014.03.009

Cited by 37 publications

(11 citation statements)

References 31 publications

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“…4), but also increase of CO. Unlike using conventional NOx reduction additives where CO remain the same in all the additives supplied range (Kuang 2014;Wang et al 2012). That directs that the main effect of NOx reduction is CO gasses.…”

Section: Comparison Of Nox Reduction Efficiencymentioning

confidence: 97%

Comparison of NOx Emissions Decreasing Methods for Biofuel Boilers

Sereika

Buinevičius

Jančauskas

2017

Proccedings of 10th International Conference "Environmental Engineering"

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Abstract. The main idea of research is to figure out the emissions of nitrogen oxides reduction using various type of reduction methods. In experiments were used NOx reduction methods: high CO emissions generation, flue gas recirculation, water and water vapor supply, selective non-catalytic reduction (SNCR), and SNCR with flammable additive. This study presents emission and combustion results obtained burning furniture production waste which generates higher rate of NOx emissions. The result of research shows, that CO emission has the biggest impact factor -on reducing NOx emission. Burning fuel in combustion zone with first and secondary air ratio (40/60) and using methods for higher generation CO emissions reached 3.000 mg/m 3 which reduces NOx emissions up to 83%. Using selective non-catalytic reduction with traditional and flammable additives reduction of NOx emissions reached up to 55%.

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Section: Comparison Of Nox Reduction Efficiencymentioning

confidence: 97%

Comparison of NOx Emissions Decreasing Methods for Biofuel Boilers

Sereika

Buinevičius

Jančauskas

2017

Proccedings of 10th International Conference "Environmental Engineering"

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“…In the absence of free oxygen content, nitrogen secluded from the solid fuel can hardly form a compound with oxygen to NO and NO2. Therefore, while the amount of excess air is decreasing, decreased free oxygen content is one of the reasons why NOX concentration in the flue gases is reduced [6][7][8][9].…”

Section: Fig 8 Nox and Co Concentration Values Depending On Flammablmentioning

confidence: 99%

NOx removal by NH3 and flammable additives in the selective non-catalytic reduction (SNCR) process

Sereika

Buinevičius

Puida

et al. 2017

mech

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“…It should be noted that an unreasonable reductive zone would cause a reduction in combustion efficiency. 13,14 In summary, achieving clean and efficient coal combustion requires a balance among the variations in the two indicators of high combustion efficiency and low-NO x emissions.…”

Section: Introductionmentioning

confidence: 99%

NO_x emissions of pulverized coal combustion in high‐temperature flue gas

Zhu

Lyu

2020

Asia-Pacific J Chem Eng

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An improved high-temperature flue gas combustion technology was developed and examined in this study. The high-temperature flue gas generator generated a flow of flue gas at a high temperature (720 C) with low oxygen content (10%), which flowed into the main combustion zone and acted as the carrier gas for pulverized bituminous coal (0-0.355 mm) in the combustion chamber. In the combustion chamber, the coal particles reached a higher combustion temperature (>1,100 C) in a short time, and the temperature difference was within 230 C, which showed that the local oxidation zone had been avoided. Furthermore, air-staging combustion technology was also adopted in combination with this technology. NO was the main nitrogen-containing compound, and the concentrations of other nitrogen-containing compounds (N 2 O, NH 3 , and HCN) were extremely low. The NO concentrations were reduced to 0 ppm twice when the volatiles released rapidly in the initial stage, and the volatiles burned violently in the intermediate stage, which are the main reasons for the significant reduction in NO x emissions. The original emissions of NO x were 187.2 mg/m 3 (@6% O 2), and the conversion ratio of fuel-nitrogen to NO x was 16.6%. High-temperature flue gas combustion technology has reached low-NO x combustion for pulverized coal.

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Evaluation of staged air and overfire air in regulating air-staging conditions within a large-scale down-fired furnace

Cited by 37 publications

References 31 publications

Comparison of NOx Emissions Decreasing Methods for Biofuel Boilers

Comparison of NOx Emissions Decreasing Methods for Biofuel Boilers

NOx removal by NH3 and flammable additives in the selective non-catalytic reduction (SNCR) process

NO_x emissions of pulverized coal combustion in high‐temperature flue gas

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Evaluation of staged air and overfire air in regulating air-staging conditions within a large-scale down-fired furnace

Cited by 37 publications

References 31 publications

Comparison of NOx Emissions Decreasing Methods for Biofuel Boilers

Comparison of NOx Emissions Decreasing Methods for Biofuel Boilers

NOx removal by NH3 and flammable additives in the selective non-catalytic reduction (SNCR) process

NOx emissions of pulverized coal combustion in high‐temperature flue gas

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NO_x emissions of pulverized coal combustion in high‐temperature flue gas